Automatic knock-off and hook stop for looms



Jan. 18 1927.

J. HARRISON AUTOMATIC KNOCK-OFF AND HOOK- STOP FOR LOOMS 5. 1925 2 Sheets-Sheet 1 Filed Oct.

Jffi'drriaon ATI'ONUEY s m w Jan. 18 1927. 1,615,082

J. HARRISON AUTOMATIC KNOCK-OFF AND HOOK STGP F611 LUOIIS 1 1166.001? 3. 1925 2 Sheets-Sheet 2 J Harrison ATTORNEY \VITNESS:

Patented Jan. 18, 1927.

JEFF HARRISON, F ATLANTA, GEORGIA.

AUTOMATIC KNOCK-OFF AND HOOK STOP FOR LOOMS.

Application filed October 3, 1925. Serial No. 60,232.

The object of this invention is to provide means, of novel construction, for discontinuing the operation of a loom in the event that the shuttle fails to properly enter a box.

A further object is to effect this result by mounting an engaging device or devices on the lay beam, for cooperation with other de vices on the loom frame and having connection with the shipping lever, said devices on the lay beam being under the control of a binder or binder finger, and being in oper ative position for cutting off the power if the shuttle fails to produce suflicient pressure on the binder,the normal pressure on the binder, by a properly boxed shuttle, resulting in the continued running of the loom, because the cut-off devices are then inactive,

A further object is to provide a cushioning device to be rendered operative, for relieving the shock, as soon as the cut-off mechanism has operated.

A further object is to provide particular means, including adjustable mounting devices, for resiliently holding the devices pivotcd on the lay beam and engaged by the binder, and which are adapted for engagement with an element one end of which moves in an arc-shaped path and which has connection with the shipping lever, for auto- :40 matically cutting off the power under the conditions specified.

.With the foregoing and other objects in view, the invention consists in the novel construction and arrangement of elements described, illustrated. and claimed, it being understood that modifications may be made within the scope of the claims without departing from the spirit of the invention.

In the drawings, forming part of this application,

Figure 1 is a view of a portion of the machine in front elevation, with my improve ments applied thereto, parts being in section and parts being broken away;

Figure 2 is a vertical section on line 2-2 of Figure 1;

' ii igure 3 is a vertical section, in the same plane, the operative elements being in an other position;

Figure 4 is a fragniientary view, showing in top plan a shuttle within its box and engaging the binder which controls the operation of the cut-off mechanism.

Figure 5 is a vertical section of the loom frame showing the shock absorbing device.

The upright members of a 100m frame are designated 10, and pivotally mounted with reference to the lower portions 11 are the lay members 12, the lay beam being designated 13.

In connection with each shuttle box a binder finger 16 is provided, these elements being mounted as at 17, and the inner end portions thereof engaging stop pins such as 18, located as shown.

A rock shaft 20 extends transversely with reference to members 10 of the frame, and is received by bearing brackets 21 bolted to the lay beam, adjusting screws 23 entering the brackets 21 and serving an obvious purpose in providing for endwise adjustment of the shaft 20.

Rigid with reference to rock shaft 20 are angle elements, each including a finger 24 to be engaged by the binder and including a hook portion 25, the latter extending rearwardly beneath the lay beam, and being adapted to engage the knock-off mechanism. This mechanism includes arm 26 pivoted at 27, and having formed thereon or attached thereto a finger 28 to be engaged by hook 25, which drops to engaging position under the pressure of a flat spring 30 if the shuttle fails to enter the box. If, however, the shuttle is properly boxed, the binder 16 bearing on linger 24 raises hook 25 and the latter clears linger 28, so that the knock-ofi mechanism does not operate.

Assuming that the shuttle S does not enter the box, and engagement takes place between elements 25 and 28, arm 26 will be thrown, and element 32 pivoted to arm 26 will throw out the shipping lever 33 with which element 32 is connected, at 34.

Lever 33 is fulcrumed at 35, and element 32 may be in two relatively adjustable parts connected by coupling 37. Lever or arm 38 also pivoted at 34 is fulcrumed at 39, and is to be connected at 40 with element 41 acting to release a clutch, or to otherwise throw off the power, in order to prevent damage to the cloth or to the loom.

A shock absorbing device mounted on frame member 10 includes a bar 42 which may have one end formed as a finger 43 spaced forwardly of finger 28, and adapted to be engaged immediately after the ship ping lever has been released. Bar 42 is retained by bolt 43' passing between the members of a stirrup 44, and the latter retains a block of rubber 45 held by a plate 46 within the stirrup, the rubber bearing against edge 47 of the frame. A set screw 48 and lock nut provides means for adjustment, and the stirrup is held against movement in one direction by stop 50, the resilient element 45 permitting bar 42 to rise when finger 43 is engaged, and the compression of the rubber element providing for the absorption of the shock. End portion *2 of element 12 is curved as shown, and movement in that direction is prevented by the curved portion of the frame where contact is made.

Spring 30 passing through bracket 51 may be adjusted by set screw 52, the element 30 having its end deflected at 53, and the adjustment being effected by deflecting or ten sioning the spring between the end portions thereof, which have positive contact with the elements shown.

A staple 54 secures spring 30, and a spring clip or the like 55 engages the leg portions of the staple, and passes between element 30 and the beam.

The adjustment by means of set screw 52 determines the pressure required to cause the shuttle to operate the angle member or members comprising fingers 2% and hooks 25. Lock nuts for the screws 52 and wherever desirable on the machine will be provided.

The operation has been fully covered in connection with the description of the construction, and will be clear to thoseskilled in the art.

hat I claim is 1. In a loom, a lay beam, protector mechanism including a binder finger, a hook ex tending rearwardly beneath the lay beam and moving with the beam, a pivotally mounted arm having a portion thereof projecting into the path of movement of the hook, pressure on said binder finger by a shuttle moving the hook out of said path when the shuttle is properly boxed, a shipping lever, means operated by the pivotally mounted arm for throwing out the lever, and shock absorbing means movable upwardly when engaged by the hook moving transversely, and being normally spaced from the pivotally mounted arm and engaged by the hook subsequently to the operation of the shipping lever.

2. In a loom, a lay beam, protector mechanism including a binder finger, a hook extending rearwardly beneath the lay beam and moving with the beam, said hook including a portion engaging the binder finger, an adjustably mounted resilient device engaging said portion of the finger, a pivotally mounted arm having a portion thereof projecting into the path of movement of the hook, a shipping lever, means operated by the pivotally mounted arm for throwing out the lever, and shock absorbing means including a bar, a strap, and a resilient element compressed by the strap upon movement of the bar upwardly when engaged by the hook moving transversely, said bar being normally spaced from the pivotally mounted arm and engaged by the hook subsequently t0 the operation of the shipping lever.

In testimony whereof I affix my signature.

JEFF HARRISON. 

